相关试题
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有载调压变压器并联运行时，其调压操作应轮流逐级或同步进行
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在电网额定电压下，对电力电容器组的冲击合闸试验应进行10次，熔断器应不熔断
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放紧线时，应按导地线的规格及每相导线的根数和荷重来选用放线滑车
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电流互感器一次绕组匝数多，二次绕组匝数少
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安装电动机的轴承时应将有型号的一面朝内，以方便维修和更换
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智能表如果有失压报警或提示，不必抄录失压记录
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电动势的方向规定为高电位到低电位的方向，也就是电位降方向
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降低接地电阻的方法有补打接地极、增加埋深、采用紫铜板作接地极、加化学降阻剂、换土、引入人工接地体等
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抄表员根据实际地理环境，设计合理的抄表顺序，经审批后在系统中进行调整
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动力用电，不论高压或低压容量大小，一律执行分时电价
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为使触电者迅速脱离电源；不用考虑安全事项，赶紧拖出触电者
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用配制的底料对裂纹处进行涂刷，待底料固化后，再用环氧胶泥填平修补裂纹，固化后对表面进行处理，再进行下步操作
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应急柴油发电机一般宜选用高速、增压、油耗低、同容量的柴油发电机组
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多根电力电缆并列敷设时，电缆接头要并排装接，以方便检修
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装设同杆架设的多层电力线路接地线，应先装设低压、后装设高压，先装设下层、后装设上层，先装设近侧、后装设远侧。拆除接地线的顺序与此相反
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经电流互感器的三相四线电能表，一只电流互感器极性反接，则电能表会走慢1/3
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基本电费可按变压器容量计算，也可按最大需量计算，具体选择办法，由供电企业报装部门确定
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在铁心内部产生的环流称为涡流，涡流所消耗的电功率，称为涡流损耗
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反映电感线圈自身功能的参数叫电感，用符号L表示
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特殊性巡视为查明线路发生故障的地点和原因而进行的巡视
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与10kV开关站相关的线路跳闸后，运行人员应做故障特巡检查
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高压柱上负荷开关由隔离开关和灭弧室组成，它可以切断较大的短路电流
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电容器加装放电装置，是为了在电容器停电后，尽快地放尽电容器的残余电荷
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电流互感器二次侧具有多组绕组，若仅使用一组绕组，则为保证计量的准确性，其余绕组应保持开路状态
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对执行分时峰谷电价的用户，大力推广使用蓄热式电锅炉(电热水器)和冰蓄冷集中型电力空调器，对改善系统负荷曲线，用户减少电费支出都有好处
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电气图的表达形式有很多种类，简图是其中一种，简图就是简单的图
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当设备状态发生改变时，应在状态改变后的10个工作日内完成其PMS信息更新工作；对于资产移交的设备，可不录入PMS
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由于铝导线比铜导线导电性能好，故使用广泛
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熔断器选择的主要电气参数：额定电压、额定电流、极限分断能力
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接地沟的回填宜选取无石块及其他杂物的泥土，并应夯实
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熔断器的额定电流应小于熔断体的额定电流
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单相两孔插座两孔平列安装，左侧孔接火线，右侧孔接零线，即“左火右零原则”
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配电箱在支架上的安装固定与在墙上的安装固定方法相同
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采用手工抄表、抄表机抄表、远程抄表等不同抄表方式可以混编在一个抄表段内
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在线路设计中，当档距增大时，应适当减小导线的截面，以保证线路弧垂对线路下方的安全距离
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起吊变压器时，作用在卸扣结构上受力的方向应符合要求，否则允许起吊重量将大为降低
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电缆线芯与接线端子压接后应修整棱角毛刺
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钢带铠装的三芯挤包绝缘电缆，铜屏蔽层与钢带的接地可用2根互相绝缘的接地线分开焊接
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9.The police are investigating the three men allegedly _________organizing and carrying out the bank robbery.
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10.I do not doubt in the least that inflation leads to _________decline.
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11.A blizzard _______________great drifts of snow across the lake.
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12.Tim says _________everybody will be affected by the tax increase, but I’m sure he’s exaggerating.
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1.China’s economic success over the past three _________has raised the living standards of hundreds of millions of Chinese citizens.
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2.Citibank picked the chief executive of Etang.com as its first Chinese customer Thursday to open an account at its new branch in the _______Pease Hotel along Shanghai’s fabled waterfront.
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3.The United States last Wednesday _________tariffs关税 of up to 30 percent on a range of foreign steel imports to help protect its domestic国内的industry.
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4.Although he was raised as a Christian, he’s not really very _________.
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5.You can distinguish between frogs ands toads蟾蜍 in the following way: frogs have _________bodies, long limbs, and a smooth skin, and toads have stouter bodies, short limbs, and dry skin.
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6.From the airplane window I could see a _________of city streets.
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7.Aunt Pat smiled at her little niece and _________her to eat.
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8.Dr. Rich Hamilton is planning his own World Wide Web _________on the Internet to provide assistance to anyone who asks for medical help.
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9.It is difficult to estimate the number of people doing part-time jobs _________
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10.The president _________his foreign minister, Mr. Burns, to act as representative to the international conference to be held in Tokyo next month.
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11.Advances in telecommunications have meant that it is just as easy to work from a computer _________at home as it is from a town center office.
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12.Until the new gym is built, you have no option but _________existing buildings which may or may not suit your immediate目前的requirements.
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1.According to some scientists, global warming _________the survival of the whole human race.
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2.The number of visitors from parts of Scotland not including the Edinburgh area was, in fact, relatively small19%, and exceeded the number of overseas visitors16%_________.
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3.The early Spaniards established a chain of mission _________the local population along the San Antonio River.
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4.It was common practice then that when the store owners wanted to go on vacation they simply _________
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5.As they didn’t have relatives or friends there they often _________around nearby malls when they got bored.
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6.To make a birthday card, you can simply cut out some funny or pretty pictures from magazines, _________them _________a piece of card and then write your message inside.
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7.She picked up the receiver and, _________ asking the caller to hold on, went off to tell Jack that he was wanted on the phone.
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8.To relax himself for a little while, he rose from the computer desk, walked across the room towards the window and stretched both arms upwards and _________.
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9.The new product has a pair of small loudspeakers fitted inside, which you can easily _________ your computer’s sound card.
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10.Music in fact is a _________language of a non-verbal nature which is rich in expression.
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11.This _________is designed to show at a glance how many rooms have been rented out and how many are still available.
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12._________ glorious sunshine, the boundless stretch of corn fields looked an impressive sight.
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1.The cook put the meat on a plate, _________it with salt and pepper, wrapped up the plate in aluminum foil铝箔 and then placed it in the oven to roast.
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2.Every waking moment we talk to ourselves about the things we experience. Our self-talk, the thought we communicate to ourselves, _________control the way we feel and act.
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3.John made everyone laugh when he got the words _________and referred to himself as “my husband’s wife”.
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4.You can’t live a perfect day without doing something for someone who will perhaps never be able to _________you.
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5.Because the Earth is a sphere, sailors _________only can view other ships to a distance of about 13 miles before those ships seem to disappear into the horizon.
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6.Johnson dismissed _________ideas lightly as no good on several occasions.
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7.One tends to believe whatever one repeats to oneself sufficiently often, whether the _________be true or false.
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8.Susan told me numerous times how her sister _________children.
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9.I don’t know what my roommate is up to because he does everything _______________, either when I am away or when I am asleep.
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10.For economic reasons, shipbuilders have designed vessels___ that can be loaded and _________in a minimum amount of time with minimum labor.
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11.Laugh, and the world laughs with you; _________, and you weep alone.
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12.A national debate is now _________about the manner in which we as a society should protect our natural resources.
